#bttop{
    border: none;
    background: url(../images/btt_bg.png) no-repeat;
	width: 60px;
	height: 60px;
    text-align: center;
    position: fixed;
    bottom: 20px;
    right: 60px;
    cursor: pointer;
    display: none;
    color: #fff;
    font-size: 11pt;
    font-weight: bold;
	z-index: 9999999;
}
#bttop:hover{
    background: url(../images/btt_hv.png) no-repeat;
}